.RFD file extension is popular essentially, for its role is important in various Windows Operating Systems. And it also features in many other functions and programs on the PC. This file extension is very important in the successful performance of the taks on the PC. Usually, users can easily open .RFD file without any problem. If you can't open a .RFD file, you can go through the listed possible reasons and figure out the exact cause of this error:

The file is corrupted or damaged.

The appropriate application is not installed.

The version of the application needed to open the file is not correct.

Those advanced computer users can easily figure out the problem and open their files. If you decide to fix the problem manually, you'd better have the basic knowledge of how the computer works. You should be very careful and patient, especially making changes to system registry. Otherwise, you will get in another problem when trying to fix one. According to our research, there are too many computer users having difficulty in opening files, and you are not the only one who get .RFD file extension error like other Windows users. For the sake of saving your time and hassle, it's recommended that you use an automatic file open tool to help you open various files.